Veiny area below right breast. Cause of concern?

Hello all! I'm new here, so forgive me if the placing of this post is in the wrong section.
Here goes my question. I got this weird, veiny looking area below my right breast recently (like a month or two ago). It's small, thin, purplish veins. It continues to my right side of rib cage.
I'm worried because I have also been having digestive (colon) problems. Could it be related? Some more info if it helps: I'm 21, female. I hadn't noticed the veiny area until after I started having the digestive problems (which has been since Nov. of last year). Also, my breasts have been hard (sort of like when my period is nearing) since this whole ordeal.
Is this a cause of concern?
The photos I included are darkened a bit so it's visible on screen.